<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    div{
      width: 200px;
      height: 50px;
      border: 1px solid red;
      text-align: center;
      line-height: 50px;
      text-shadow: red 20px 20px 5px;
      font-size: 20px;
    }
    h3{
      font-weight: bold;
    }


  </style>
</head>
<body>
<h3>this is h3</h3>
<div>
  文本文字
</div>
</body>
</html>